Malicious PDF — malware analysis report

Static analysis result for SHA-256 27e50682c7782181…

MALICIOUS

PDF

62.3 KB Created: 2021-06-16 07:23:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: aeb4f16b3b38d98ecef103a7c4800e0e SHA-1: ce41ac4d947734770938750b2db72a40118098e9 SHA-256: 27e50682c778218161bfc7e50351dcce8f411870ad4ab3e5550dba875b4121af
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites. The presence of the 'ML_NYX_PDF_MALICIOUS' heuristic and ClamAV detection strongly indicates malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure suggests a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6845

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://chcial.ru/uplcv?utm_term=download+jumpstart+dan+wps+pin PDF link annotation
    • http://creative-format.com/upload/editor/files/47399070599.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/7e6844d6696bf24cdb16cf31eda3ad24/lugeliva.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5f18de279---bebivod.pdfIn PDF document text
    • http://essiac.cz/UserFiles/file/64110420661.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/wedukorewijixoxap.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/091043dfce8dc2879965dc88c2dfb78f/27880204387.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/761ijkvdj8qela3ukmua73b5n3/5699292278.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/10695141772.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c22a420df2f---20987798199.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//jidifexugafikomafidig.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ca21aba5ed1b3f9d543c8e06f1d867c8/lapisojexujesexe.pdfIn PDF document text
    • http://eurekaelearning.com/upload/news/file/13555581497.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/q0db50ojf9kijchp6dbu4oi46c/ronafe.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa38235dfd7---61008883067.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607536d08d495---81843654256.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160830ce2836a3---sidoxodozobexaxorafuri.pdfIn PDF document text

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